Question 1

How to add random errors with Mockingjay Server?

Accepted Answer

Use the monkey configuration in YAML to specify error statuses like 404 with a frequency, e.g., `- status: 404 frequency: 0.3` returns a 404 error 30% of the time, simulating unreliable services for testing.

Question 2

Mockingjay Server or WireMock for HTTP mocking?

Accepted Answer

Mockingjay Server is simpler with zero dependencies and YAML configs, ideal for quick setups. WireMock offers more features like programmable stubs and stateful behavior but requires Java and more configuration overhead.

Question 3

Can Mockingjay Server handle wildcard matching in request bodies?

Accepted Answer

Yes, you can use `*` in the YAML request body to match any body, as shown in the example with `body: "*"`, allowing flexible endpoint definitions without exact string matches.

Question 4

How to validate mocks against a live API?

Accepted Answer

Run the tool with the `-realURL` flag pointing to the real service; it will test each configured endpoint for compatibility and report inconsistencies, ensuring your mocks are reliable.

Question 5

Is Mockingjay Server good for load testing?

Accepted Answer

It can simulate performance issues with delays and garbage responses via monkey configs, but it's not a full load testing tool—it's best for integration testing under erratic conditions rather than high-scale simulations.

Question 6

How to debug requests sent to the fake server?

Accepted Answer

Access the `/requests` endpoint on the running server to get a JSON list of all received requests, which helps verify client behavior and identify issues in test flows.

Question 7

Does Mockingjay Server support JSON responses?

Accepted Answer

Yes, you can define JSON bodies in the YAML response section with proper headers, e.g., `body: '{"message": "hello"}'` and `content-type: application/json`, as demonstrated in the README example.

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